Coordination between antioxidant defences might be partially modulated by magnesium status

Area of Science:

• Exercise Physiology
• Biochemistry
• Nutritional Science

Background:

• Competitive swimming induces oxidative stress.
• Magnesium plays a role in cellular functions and antioxidant defense.
• Understanding redox balance in athletes is crucial for performance and health.

Purpose of the Study:

• To compare redox balance between competitive and recreational swimmers.
• To investigate the influence of magnesium intake on oxidative stress markers.
• To identify correlations between antioxidant status and exercise-induced damage.

Main Methods:

• Recruited 15 competitive and 16 recreational male swimmers (18-25 years).
• Assessed oxidative and muscle damage markers, antioxidant enzymes, and non-enzymatic antioxidants.
• Utilized photometry and fluorimetry for various biochemical analyses.

Main Results:

• Initial analysis showed correlations between uric acid, glutathione reductase (GR), red blood cell peroxidation (RBCPx), adrenaline oxidase (AdOx), thiobarbituric reactive substances (TBARS), Vitamin E, creatine kinase (CK), and superoxide dismutase.
• Controlling for magnesium intake revealed new correlations between carotenoids, TBARS, lactate, AdOx, cortisol, and muscle damage enzymes.
• Key associations lost significance after controlling for magnesium, suggesting its modulatory role.

Conclusions:

• Magnesium intake appears to modulate the coordination of antioxidant defenses in swimmers.
• Magnesium's ability to stabilize cell membranes and oxidation targets may underlie its effects.
• Findings suggest magnesium's importance in managing exercise-induced oxidative stress and muscle damage.